Improvement in permutation-locks



"dichiari time @met dimite..

EDWARD. W. BRETTELL, OE ELIZABETH, NEW JERSEY.

Letters Patent No. 108,561, dated October 25, 1870.

IMPROVEMENT IN PERM UTATlON-LOCKS.

The Schedule referred to :in these Letters lPatent; and making part of the same I, EDWARD W. BRuTTELL, of thecity `of Elizabeth, State of New Jersey,v have invented certain Improvements in Permutation Bank-Locks, of which the following is a specilication.

The improvement consists in the adaptation and combination of' a pallet, with the movements of a permutating bank-lock.

In the accompanying drawing- Figure 1 is a view of the inside of the lock;

Figure 2 is a transverse horizontal section of th lock and of its parts; b lFigure 3 is a view of the vibrating arm and the o t; Figure I is an edge sectional view of the vibrating arm;

I iigure 5 is an edge sectional view of the pallet;

Figure (i is a top View of the same; and bl Figure 7 shows the parts of one of the disk-tumers.

The bolt a slides en the projection b of the case of the lock. A

The socket c of the vibrating arm d enters and turns in thc projection b.

Upon the back o f the arm'd is a pin, e', which engages in a slot in the bolt, and byl which the bolt is moved, the end of the arm abutting against the bolt head, and backing it up by direct resistance, when the bolt is thrown out.

Upon the socket f of t-hel arm d are placed four (more or less) disk-tumblers.

The revolving wheel h has a projection, h', which enters and turns in the end of the socket f.

In `the center of this wheel is a square hole, y, which admits the small inner end of knob-shaft i, by which the locking and unlockingr is effected.

Upon the arm d is a stud, d', on the end of which the socket of the pallet j fits and vibrates. I One end of the pallet has a catch,"L-, which catches under the stop k, and the other end has a projection, fw, which, when at liberty to do so, descends into the recess Zin the driving-wheel It, thus connecting the movable parts of the lock with the knob, and releasing the catch c of the pallet from the stop 7;, when, by turning the knob, the arm d and the pallet j are lifted away from behind thc bolt, and, at thc v same time, withdrawing the bolt.

In the edge of the four disk-tumblers is a recess, m, and, there being attached to the pallet j the edge bar a, the recesses of all the t-umblers must he brought into a line, under the bar n, before the arm 'w of the pallet can descend into the recess lin the driving-wheel h.

Ther-.proper position of the tumblcrs is indicated by numbers or letters on the dial-plate, as in all perimitating-locks.

rlhc disk-tumbler, shown in fig. 7, is constructed of two flat rims of sheet metal, g, and one disk, 1.

The periphery of the disk has a lip extending .between the rings, thee inner edges of the rings iitting around a shoulder provided ou each side of the disk, to keep' the disk central yet free to turn.

It is of the greatest importance that these disks should not be liable to shift their` position, while, at the same time, they sbouldbe easily released and shifted when desired, for, by shifting the relative position to each other of the pins s, the combination numbers of the lock can be varied a great number of times, at the option of the operator.

The two rings g are connected by the screw o, and by the turn-button p, the pressure ofthe inner edges oi the' rings on the lip ofthe disk being graduated by the screw, and is made to bear equally all round by the turn-button, said button being introduced through an oblong hole in both rings, and, by turning it a quarter turn, it brings its inclined edges at the end across the hole, drawing the edges tight together. A slight roughness on the sides'. of the rings, or en the sides of the lip of the disk, adds to the friction depended upon to insure rings and disk against slipping when locked by the turn-button.

When the recesses m in the rings are on a line, so that the edge bar can enter aud hold them, the turnbuttous are all on a line also, and a key, consisting of a long stem with a very small feather upon it, is introduced into the key-hole, shown iu the button, by which the rings are released from pressure upon the disks, while the operator, by means of the knob and driving-wheel, shifts the relative positions of the pins s to vary the combination, as desired.

The key is so made that it cannot relieve one of the tumblers without releasing ,all the others, nor can it bc withdrawnwithout locking themall.

This object is accomplished by having the feather just the length of the thickness of the s et of tuniblcrs, when upon thc socket onwhich they all turn.

In each disk isa recess, r, in which is a stud or pin, s, and there is also a pin,.t, on the back of each disk.

There is also a pin in the driving-wheel h., to impinge against the :pin in the disk next to it, and moves all the rings when pin touches pin in all the recesses.

What I claim, and desire to secure by Letters Iateut, is-,

The pallet j, having catch Iv at one end and projcction w at the other end, and pivoted near its center to the vibrating arm d, in combination with the stop k, driviug-wheel h, and bolt a, substantially as and for the purpose set forth.

E. WL BRETTELL.

Witnesses W. M. Goonnve, EDWARD GoLLvnn. 

